Was going to post this in the HUCA thread, but it's a good tip as well. CSRs, often leave out vital details when relaying the situation to their supervisor. Case in point:
I had a Delta flight to Israel that had a schedule change entitling me to a free change. We were scheduled to leave Monday, and were hoping to leave a few days later. The issue was the the Tue and Wed night flights were sold out, Thu flight lands too close to Shabbos, Sat night flight was going to cut it close, so the only viable option was the following Sunday almost a full week after the scheduled flight. Apparently this needs a supervisor approval. First call after back and forth for about an hour, the agent came back on the phone and said the supervisor denied the change. He wanted all kinds of details as to why the change didn't work for us. He then proceeded to yell at me accusing me of trying to use the schedule change as an excuse for a voluntary change
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Next day I HUCA'd got a much friendlier [female] agent, and went through the same shpeil where she came back and said the sup. denied it. So I tried being persistent, and she asked if I would like to speak to her sup. "Sure". Sup got on and I said "So I'm trying to change my flight to Tuesday..." She interrupts me: "Tuesday? The CSR said Sunday." So I explained how I tried to change to Tuesday but the flight was sold out, etc etc. I even apologized for the "miscommunication" but she insisted that Delta was to blame.